<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<link href="css/bootstrap.min.css" rel="stylesheet" />
		<style type="text/css">
			/* div {
				background-color: orange;
			}
			 */
			div[class^=col] {
				border: solid 1px orange;
			}
		</style>
	</head>
	<body>
		<div class="container">
			<div class="row">
				<div class="col-md-10 col-sm-6">abc</div>
				<div class="col-md-2 col-sm-6">123</div>
			</div>
			<div class="row">
				<div class="col-md-6">6</div>
				<div class="col-md-6">6</div>
			</div>
		</div>
	</body>
</html>
